I followed this from Ublock's Reddit page, it's working for now.
Current anti-adblock status: Latest fixed (ID: 462a8d5d)*
Please, remember these 3 steps:
Force update all your filter lists (click uBO icon > ⚙ Dashboard button > Filter lists pane > 🕘 Purge all caches > 🔃 Update now)
Turn off all other extensions AND browser's built-in blockers
Remove all your current custom filters AND custom filter lists that you have enabled / added manually (Adguard lists...)
It might be quicker to make a backup of your config and restore to defaults before proceeding to step 1.
Fixing anti-adblock can cause ads slipped. If you see any ads slipped, please report back the EXACT URL and your country when accessing the URL so volunteers are able to investigate.
The filter lists can be updated multiple times a day, so please always do step 1 before reporting.
About the ID above, it's the ID of YouTube's script that's used for anti-adblock, you can monitor it via this link: https://pastefy.app/G1Txv5su/raw (top to bottom is oldest to latest). It means that the current fix is matched with the script with corresponding ID.
If the latest ID (the last line) does not match the current one written above, it means YT has updated the new one and it might cause anti-adblock again. If it matches and you still get anti-adblock, kindly check the 3 steps above. Thank you.